| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Outline of Final Research Achievements |
The purpose of this study is shape optimizations to improve the efficiency of electromagnetic devices such as motors. Moreover, fast computations of electromagnetic filed analysis which is necessary for the optimizations are investigated in this study. An ON/OFF method in which a bitmap expresses the distribution of material is adopted. This method has a poor ability of expression for curved surfaces. The terraced surfaces deteriorate accuracy of finite element analyses. To solve this difficulty, half material state is introduced. The proposed method is applied to an optimization to maximize torque of permanent magnet synchronous motors. The numerical results show that the present method can obtain the optimum shape of routers.
A deflation method which can improve convergence of linear solvers is introduced so as to reduce the computational cost of the optimizations. The numerical results show that the deflation method can successfully reduce the computational cost of analyses.
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